Posted: Jul 25, 2010 1:01 pm
At first I mis-read "it was shaped by a human hand" as "it was shaped like a human hand" and thought, that one near the bottom left looks a bit like a thumb
Lifeboat for the rational mind :D
http://www.rationalskepticism.org/
http://www.rationalskepticism.org/viewtopic.php?p=368818#p368818